package com.qk.interceptor;

import com.qk.utils.JwtUtils;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
//拦截器
@Component
@Slf4j
public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取请求路径
        String uri=request.getRequestURI();
        //2.判断请求路径是否包含：login,如果是,放行
        if(uri.contains("login")){
            log.info("登录请求:{},放行",uri);
            return true;
        }
        //3.获取请求头 token
        String jwt = request.getHeader("token");
        //4.判断token是否存在,如果不存在返回401状态码
        if(jwt==null||jwt.isEmpty()){
            log.info("请求头token为空");
            response.setStatus(401);
            return  false;
        }
        //5.解析令牌,如果令牌报错,返回401状态码
        try {
            JwtUtils.parseToken(jwt);
        }
        catch (Exception e){
            log.info("令牌解析失败");
            response.setStatus(401);
            return false;
        }
        //6.放行
            return true;
    }
}
